GG8 



ANATOMY OF VERTEBRATES. 



prostates, b, Z>, have eacli a small central cavity; whence the 

 duct is continued to terminate near the sperm-duct, in an oblong 

 depression by the side of the verumontanum : on a small fold of 



525 



526 



Testes, pi-ostates and protometra, Goat, ccxxxix". 



this part is the orifice of the protometra which is continued, at 



c, between the dilated sperm-ducts, closely 

 attached thereto by areolar tissue ; then di- 

 viding into two horns diverging and closely 

 apposed to the sperm-ducts, a, a, as far as 

 the epididymis, in which they are lost. The 

 Cowperian glands, two on each side, open 

 upon the margin of a fold at the bulb of the 

 urethra. The prostatic glands in the Deer, 

 fig. 526, b, b, are more slender in propor- 

 tion to their length than in the Goat. The 



O 



protometra, c, is reduced to a hardly dis- 

 tinguishable trace ; and its cavity, which 



O v J 



exists in the embryo, is obliterated at 

 birth. 



In the Bull the narrow elongate prostates 

 are irregularly contorted. The ' erectores ' 

 and t acceleratores ' are powerful muscles. 

 The slender ' retractor es ' arise from the 

 anterior commissure of the sphincter ani. 

 There are preputial follicles in most Rumi- 

 nants, especially the Antelopes ; but only in 



the Muskdeer do they attain the size and structure described in 



the preceding chapter. In no hoofed Mammal is there an ( os penis.' 



379. In Cnrnivora.- -The outward indications of the male sex 



Prostates and pvntnmetrn, Deer 



CCXXXIX". 



